US Bridges

Perins Canyon DR over Lightner Creek

Fair

La Plata County, Colorado · 1.0 MI W of HWY 550 · Structure no. DURANGO-004

Built
1978
47 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
627
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Perins Canyon DR over Lightner Creek is a steel stringer/multi-beam or girder carrying Perins Canyon DR over Lightner Creek in La Plata County, Colorado. It was built in 1978, so it is 47 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 627 vehicles a day, roughly 5% of them trucks, projected to reach 740 by 2042. The structure is 26 ft (7.9 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesPerins Canyon DR
CrossesLightner Creek
Location1.0 MI W of HWY 550
RouteCity Street 0
Coordinates37.27014, -107.90025
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.5 US tons
Inventory rating20.7 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic627 (2022)
Projected traffic740 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Perins Canyon DR over Lightner Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Perins Canyon DR over Lightner Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Perins Canyon DR over Lightner Creek carry?

About 627 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Perins Canyon DR over Lightner Creek?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns Perins Canyon DR over Lightner Creek?

It is owned by the City or Municipal Highway Agency.